Ernst egger



(No Model.)

E. BGGER.

ELECTRIC GUT-OUT.

No. 500,229. Patented June 27, 1893.

UNITED STATES PATENT OFFICE.

ERNST EGGER, OF NEW YORK, N. Y., ASSIGNOR OF ONE-THIRD TO AARON NAUMBURG, OF SAME PLACE.

ELECTRIC CUT-OUT.

SPECIFICATION forming part of Letters Patent No. 500,229, dated June 27, 1893.

Application led November 8, 1892. Serial No. 451,294. (No model.)

To all whom it may concern: cuit, at the same time, the terminal n, thereby Be it known that I, ERNST EGGER, a subclosing the local circuit Zand giving the alarm. ject of the Emperor of Austria-Hungary, and I prefer to make the strip A of the two 55 a resident of New York, in the county and metals, aluminium and steel. State of New York, have invented certain new The instrument is adapted to be used on and useful Improvements in Electric Cutcurrents of any strength, because, the same Outs, (Case No. 1,) of which the following is a may be adjusted by means of the thumb specification. screwf. By turning it so that the lever is 6o My invention relates to means for mainlowered it will do for currents of greater to taining a current closed under normal condistrength, and by raising the lever, it will be tions, interrupting the same and givinga sigadapted for smaller currents; orstripsAmay nal when abnormally great, all through the be of diterent cross section and interchangeprime agency of a thermo-expansive electric able. 6 5 conductor. All the details are set forth in The instrument is set, after operation, by

the accompanying drawing, in which the sinplacing the arm g so that it rests against the gle ligure is a longitudinal vertical section, end of the lever e. and in which the electric circuits are shown I claim as lny inventionby dots and dashes. l. An electric cut out, consisting of the 7o The device embodying my invention concombination of a curved thermo-expansive 2o sists of the combination of a metallic and electric conductor iixed at its ends, and incurved conductor, made of two strips o, b, eluded in an electric circuit; a pivoted lever which together may be called a thermo-exhaving an adjustable thumb screw which pansive electric conductor A, held rigidly at rests upon the central portion of said strip, its ends on an insulator c, and included in and a second lever, whose one arm rests z5 the circuit d; a pivoted single arm lever c against the end of the first lever, and is acted carrying a thumb screwf which rests upon upon by a tensional spring, and whose other the central portion of the strip A; a pivoted arm carries an electric terminal j, normallyin double arm lever, whose arm g normally bears contact with the opposite terminal of the said SO upon the end of the lever e near the edge, so circuit.

3o that if the lever e is lifted, the arm g can es- 2. An electric cut out, consisting of the cape by the action of the retractile spring h, combination of a curved thermo-expansive and Whose arm t' carries one terminal j norelectric conductor fixed at its ends, and inmally in contact with the opposite terminal eluded in an electric circuit; a pivoted lever S5 j of the circuit d, and an electric signal such having an adjustable thumb screw which 35 as a bell 7o, in a local circuit l, having generarests upon the` central portion of said strip, tor m, and a circuit closer whose terminals n, and a second lever, Whose one arm rests n are in the path of the terminal j, and are against the end of the tirst lever, and is acted movable. upon by a tensional spring, whose other arm The operation of the device is as followszcarries an electric terminal j normally in con- 4o Normally, a current passes through the cirtact with the opposite terminal of the said cuit d, and through the StripAand terminals circuit, and an electric alarm in a normally j, j. When the current becomes too great, open local circuit whose one terminal is movthe strip A expands so much that the lever e able and in the path of the said terminalj. is moved and the arm g slips from the end of In testimony that I claim the foregoing as 45 the lever and is pulled by the spring (normy inventionlhavesigned my name,in presmally under tension) to such an extent as to ence of two witnesses, this 2d day of Novemseparate the terminals j, j which are mainber, 1892.

tained separated until the instrument is again ERNST EGGER set. An insulator p is on the under side of Vitnesses: 5o the terminal 'n' to cover the terminal j to keep JAMES H. YOUNG,

the main current from entering the local cir AARON NAUMBURG. 

